Issue: Cannot enter test menu on TAF, button not registering.

Solution: Checked actual button, measured ok. checked wirking for broken cables, measured ok. As the the test menu button is a dedicated switch, used alligator clips to jumper the pins directly on the CPU (j205), button still not registering, therefore isolating the fault to the CPU.

Measured the way up to the logic ic's from j205 and found a broken trace not visible with the bare eye, propably a leftover from a previous battery damage repair. Soldered a jumper wire, button is now working.